SeymourDumore
Diamond
- Joined
- Aug 2, 2005
- Location
- CT
Guys who cut stamping dies for a living, I have a question.
When you design and cut a punch/die with unspecified corner radius for a finished part ( like sharp, but not actually called out as such ), what clearance do
you allow in the corners?
Case in point ( and while I do wirecut as part of my operation, tool and die is less than .01% of what I do... ), I have to make a punch and die set for a part
that is a .075 x 4.05 rectangle out of .022 thick material.
It is my part and I really do not care how sharp the corner is, just somewhat there.
So, assuming a 10% clearance, I've cut the punch to be .071 x 4.046 and gave it a .007 corner radius ( because .01 wire is what I use )
The punch is within .0003 total in both of those dims, no problem there. I can't measure the radius, but I am assuming that they are there as well.
But now, I am cutting the punch holder and in this thickness and shape I want it to be dead nuts, just under press fit.
I've got both sides ( the .071 and the 4.046 ) just right, the punch fits in both directions independently, and yet, it does not freaking go into the holder!!!
Please do not flame me for asking a really stupid question, but what radius would you use for a punch in this instance when the wire is .010?
Oh, why this is important ... Because I was a dumbass and wanted to cut all three ( holder, stripper and die ) in one setup....
When you design and cut a punch/die with unspecified corner radius for a finished part ( like sharp, but not actually called out as such ), what clearance do
you allow in the corners?
Case in point ( and while I do wirecut as part of my operation, tool and die is less than .01% of what I do... ), I have to make a punch and die set for a part
that is a .075 x 4.05 rectangle out of .022 thick material.
It is my part and I really do not care how sharp the corner is, just somewhat there.
So, assuming a 10% clearance, I've cut the punch to be .071 x 4.046 and gave it a .007 corner radius ( because .01 wire is what I use )
The punch is within .0003 total in both of those dims, no problem there. I can't measure the radius, but I am assuming that they are there as well.
But now, I am cutting the punch holder and in this thickness and shape I want it to be dead nuts, just under press fit.
I've got both sides ( the .071 and the 4.046 ) just right, the punch fits in both directions independently, and yet, it does not freaking go into the holder!!!
Please do not flame me for asking a really stupid question, but what radius would you use for a punch in this instance when the wire is .010?
Oh, why this is important ... Because I was a dumbass and wanted to cut all three ( holder, stripper and die ) in one setup....